xref: /openbmc/linux/Documentation/devicetree/bindings/serial/mediatek,uart.yaml (revision 41be03c8)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/serial/mediatek,uart.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: MediaTek Universal Asynchronous Receiver/Transmitter (UART)

maintainers:
  - Matthias Brugger <matthias.bgg@gmail.com>

allOf:
  - $ref: serial.yaml#

description: |
  The MediaTek UART is based on the basic 8250 UART and compatible
  with 16550A, with enhancements for high speed baud rates and
  support for DMA.

properties:
  compatible:
    oneOf:
      - const: mediatek,mt6577-uart
      - items:
          - enum:
              - mediatek,mt2701-uart
              - mediatek,mt2712-uart
              - mediatek,mt6580-uart
              - mediatek,mt6582-uart
              - mediatek,mt6589-uart
              - mediatek,mt6755-uart
              - mediatek,mt6765-uart
              - mediatek,mt6779-uart
              - mediatek,mt6795-uart
              - mediatek,mt6797-uart
              - mediatek,mt7622-uart
              - mediatek,mt7623-uart
              - mediatek,mt7629-uart
              - mediatek,mt7986-uart
              - mediatek,mt8127-uart
              - mediatek,mt8135-uart
              - mediatek,mt8173-uart
              - mediatek,mt8183-uart
              - mediatek,mt8186-uart
              - mediatek,mt8188-uart
              - mediatek,mt8192-uart
              - mediatek,mt8195-uart
              - mediatek,mt8365-uart
              - mediatek,mt8516-uart
          - const: mediatek,mt6577-uart

  reg:
    description: The base address of the UART register bank
    maxItems: 1

  clocks:
    minItems: 1
    items:
      - description: The clock the baudrate is derived from
      - description: The bus clock for register accesses

  clock-names:
    minItems: 1
    items:
      - const: baud
      - const: bus

  dmas:
    items:
      - description: phandle to TX DMA
      - description: phandle to RX DMA

  dma-names:
    items:
      - const: tx
      - const: rx

  interrupts:
    minItems: 1
    maxItems: 2

  interrupt-names:
    description:
      The UART interrupt and optionally the RX in-band wakeup interrupt.
    minItems: 1
    items:
      - const: uart
      - const: wakeup

  pinctrl-0: true
  pinctrl-1: true

  pinctrl-names:
    minItems: 1
    items:
      - const: default
      - const: sleep

required:
  - compatible
  - reg
  - clocks
  - interrupts

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    serial@11006000 {
        compatible = "mediatek,mt6589-uart", "mediatek,mt6577-uart";
        reg = <0x11006000 0x400>;
        interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>,
                     <GIC_SPI 52 IRQ_TYPE_EDGE_FALLING>;
        interrupt-names = "uart", "wakeup";
        clocks = <&uart_clk>, <&bus_clk>;
        clock-names = "baud", "bus";
        pinctrl-0 = <&uart_pin>;
        pinctrl-1 = <&uart_pin_sleep>;
        pinctrl-names = "default", "sleep";
    };